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Topic: Does anyone have a sample *.aa to analyze? (Read 4668 times) previous topic - next topic
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Does anyone have a sample *.aa to analyze?

Does anyone have a sample *.aa (Audible.com) file that could be used for analysis? In order to upload a complete example in the forums it would need to be non-commercial and licensed for fair use; otherwise, if someone could post even a the first few Kb of a sample file it would be appreciated.

  The goal, if possible, is to allow iTunes/iPod to play Helix Producer-authored ACELP.net audio.

    - M.

Does anyone have a sample *.aa to analyze?

Reply #1 –
Clarification: I am not trying to break Audible.com's encryption/licensing scheme. So no, I can't help anyone remove the protection from their *.aa files, nor do I intend to try. (No one here has asked this, but I was discussing it with someone else today and he completely misunderstood what I wanted to do. Lest anyone else misunderstand, it seemed best to explain with a little more detail.)

  What is hoped for is a method of transmuxing ACELP.net-based *.rm files to *.aa, from personal recordings, so that they may be played on an iPod. Unfortunately, I've not managed to find any documentation on the structure of the *.aa format; it is known to use Sipro's ACELP.net codec, but the container/header/tagging structure is unknown.

    - M.

Edit: karl_lillevold, if this is already planned for the next update of dtdrive you have my sincere thanks, in advance! I posted this request on the chance that it was not, but I'd be happy to be wrong.